Parkwood keys

[GM0WEZ]

Two interesting bugs I came across on youtube:

https://www.youtube.com/watch?v=nysX1KW_sFM Double bug

https://www.youtube.com/watch?v=1J0CURISeWw RotoTwin bug

 

[Kd5txx]

That is cool, but weird.  It?s looks like it isn?t using the weights..it almost looks hydrolic.  The movements are just like there is resistance...

 

[GM0WEZ]

Very impressed with the engineering. I wondered if a fair bit of pressure would be needed given the inertia of the rotors, but I have to say the morse being sent on it sounds pretty perfect.